Controlling device for locks.



B. H. ZIEHLER. CONTROLLING DEVICE FOR LOG-KS APPLICATION mzo Nov. 20,1914.

Patented Nov. 6, 1917.

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Patented Nov. 6, 1917.

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' CQNTROLHN APPLICATION 1,245,302.

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B. H. ZIEHLER.

CONTROLLING DEVICE FOR LOCK-S.

APPLICATION FILED NOV.20. 1914.

1,245,302. PatentedNov. 6,1917.

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BERNARD H. ZIEHI-JER? 0F DAYTON, OHIO.

CONTROLLING n'nvrcn iron LocKs.

Specification of Letters Patent.

Patented Nov. 6, 1917.

Application filed November 20, 1914. Serial No. 873,232.

To all whom it may concern: I

Be it known that I, BERNARD H. ZIEHLER, a citizen of the United States,residing at Dayton, in the county of Montgomery and State of Ohio, haveinvented certain new and useful Improvements in Controlling Devices forLocks, of whiehthe following is a specification, reference being hadthereing to the accompanying drawing.

This invention relates to controlling de-,

vices for locks and is designed more particularly for use in connectionwith recording locks, although it is not restricted to this use.Recording locks have been de signed which will preserve a record of themanipulations of the lock. Some of these devices preserve a record toidentify the particular key employed to operate the lock; others recordthe time of day at which the look was operated; and others preserve bothof these records. In these devices, as heretofore designed, however, ithas been possible for the lock and recording device to be manipulatedwhen the door has been moved into its open position, either byunauthorized persons or with intent to produce a misleading record. Suchoperation of the lock or recording device is highly objectionable inthat it provides a way in which the purpose of the lock may be defeatedto a greater or lesser extent.

The object of the invention is to provide means for preventing themanipulation of the lock or the operation of the recording device whenthe door has been moved from its fully closed position; and further, toprovide such a device which will be controlled by the movement of thedoor itself. A further object of the invention is to so construct thedevice that a very slight move ment of the door will render the lock or.recording device inoperative; and to provide such a device which will besimple in its construction and operation, thereby not only enabling thedevice to be produced at a low cost but also rendering it less liable tobecome disarranged in such a manner as to cause it to fail to performits functions or as to interfere with the normal operation of the lockand recording device. I

In the accompanying drawings, Figure 1 is a plan view, partly insection, of a device embodying my invention; Fig. 2 is a similar view ofa modified form of the invention; Fig. 3 is an elevation of that form ofthe device shown inFig. 2; Fig. 4 isaplan tion of the device shown inFig. i; Fig. 6

is a plan view of thedevice as applied to.

a sliding door; Fig. 7 is an elevation of the device shown in Fig. 6;Fig. 8 is a front elevation of a recording lock to which my. inventionmay be applied; Fig. 9 is a. vertical, sectional view of such a lock;and Fig 10 is adetail view of the connecting devices for the knob; i

In carrying out the invention it may be applied either to the lockitself. or to the recording device for the lock or to the key or otheractuatingdev-ice for the look. In the present instance I haveillustrated the invention as connected directly with the bolt of the,lock, and, in that form of lock illustrated, by controlling the bolt Ialso control the operation of the recording device and the manipulationof the lockeactuating devices. It willbe understood, however, that theinvention may be applied to the control of any one of these devicesindependently of the. others and further that the device may be usedindependently of recording locks and in any relation in which it may bedesired to controla. lock or other device in accordance with theposition of the door. It will also beunderstood that the term door orclosure as herein employed is intended to include not only the door of abuilding or a room but alsothe door of a receptacle or compartment; infact, a movable closure of any kind to which a lock may be applied.

In carrying out the invention. the con trolling device is connected withthe lock or other part to be controlled and is so arranged that it willnot interfere with the manipulation of. the lock whenthe door is in itsclosed position, that is, the position in which the lock may be operatedto lock the door against movement. The mechanism for thecontrollingdevice may be of various kinds and may be controlled eithermechanically or otherwise. Further, the mechanism may beof such acharacter that it may be applied either to a hinged door or a slidingdoor.

In order that the purpose and manner of operation of the presentinvention maybe.

more readily understood I will first describe briefly one form of.recording. loclr to the invention may be applied. It will be understood,however, that this form of lock is chosen for the purpose ofillustration only and that the invention may be applied to looks, eitherrecording or otherwise, of various kinds, and further, that theparticular recording look here illustrated is not a part of the presentinvention but forms in part the subject matter of an application forpatent filed by me October 26th, 1914, Ser. No. 868,739. As here shownthis look comprises a casing 1 mounted upon a door :2, to which the backwall 3 of the casing 1 is rigidly secured, this back wall forming asupport for the several parts of the mechanism. A bolt 4 is slidablymounted in the casing 1 and is adapted to be projected longitudinallythrough an opening 5 in one side of the casing. lhis bolt may bemanipulated in various ways. As here shown it is held normally againstmovement by two dogs 6 engaging teeth 7 in the lower part of the boltand is provided on one face with a pin or projection 8 adapted to beengaged by one or the other of the arms 9. These arms are mounted on ashaft 10 and are so shaped that when one or the other of them engagesthe projection 8 longitudinal movement will be imparted to the bolt, thedirection of this movement depending upon which arm is in engagementwith the projection. In order that the dogs 6 may be automaticallydisengaged from the teeth 7 the arms 9 are provided with pins 11arranged to engage one or the other of the pawls, depending upon thedirection in which the arms are moving, and disengage the same from theteeth of the bolt. Preferably, the bolt may be operated at any time fromthe inside of the door and, to this end, the shaft 10 is extendedthrough the casing 1, on the inside of the door, and provided with aknob 12. The operation of the bolt from the outside of the door is,however, key-controlled and, to this end, a second shaft 13 is mountedin the door and is normally free to rotate relatively to the shaft 10.As here shown the adjacent ends of the two shafts are telescopicallyarranged. lhe shaft 13 is also provided with a handle or knob 1.4., bymeans of which it may be rotated. A clutch mechanism is provided toconnect the two shafts to enable the bolt to be moved by the outer knob14. This clutch mechanism is key-controlled and is here shown ascomprising two disks 15, each having a notch 16 in the peripherythereof, which notches are arranged in alinement when the shafts are intheir normal positions. A pin 17 is mounted adjacent to the disks and isadapted to be moved into and out of the notches 16 to connect anddisconnect the disks and the shafts. As here shown, the pin 17 iscarried by a bar 18 mounted for vertical movement and having at itslower end a pin 19 adapted to be engaged and actuated by a cam 20. Thiscam is mounted on a shaft 21 adapted to be operated by a key 23, whichkey may be of any suitable character. It is here shown as well knowntype of key cooperating with the ordinary cylinder lock. It will beapparent, therefore, that the rotary movement of the key will, throughthe cam 20, bar 18 and pin 17, connect the disks 15 one to the other sothat the movement of the knob 14 will throw the bolt. ltlounted in thecasing 1 are a series of type wheels 14, a part of which are connectedwith clock mechanism The taking of a record from these type wheels iscontrolled by the movement of the bolt and, as here shown, an ink ribbon26 and a web of paper 27 are fed across the printing points of the typewheels and two platens 28 are so arranged that one of them will be movedacross the type wheels to cause an impression to be taken therefrom whenthe bolt 4 is operated. To this end the two platens are mounted at thelower ends of two levers 29 provided at their upper ends withprojectionsor rollers 30 ar ranged in the paths, respectively, of thearms 9, the outer edges of these arms being curved to form cams which,when they are actuated to move the bolt, will cause operating movementto be imparted to the re spective levers and a record to be taken. It isunnecessary to herein describe the de tails of construction andoperation of this recording look as the brief description given willenable the plan of its operation to be understood. It may be stated,however, that one of the remaining type wheels constitutes akey-identifying type wheel and another indicates the direction in whichthe bolt was moved. Further, itwill be noted that inasmuch as the boltcan be moved only by the operation of the arms 9 and that the recordingdevice can be operated only by these arms, the recording device can beoperated only when the bolt is operated. Hence, if the bolt is lockedagainst movement this serves not only to prevent the operation of theactuating devices for the lock, that is, the knobs and their connectingdevices, but also prevents the taking of a record from the recordingdevices.

To prevent the movement of this bolt and hence the operationof therecorder when the door is in any position other than its fully closedposition I have mounted on the door and connected with the look a devicewhich will prevent the movement of. the bolt when the door has beenmoved from its fully closed position. In that form of the invention hereshown the bolt l has connected therewith an extension or rod 31 whichextends across the door to a point near the opposite edge thereof and ispreferably inclosed in a casing 32 of sucha character as to preventaccess being bad either to the extension 31 or to its controllingdevices for the purpose of tampering therewith. The controllingmechanism shown in Figs. 1 to 5 comprises a detent adapted to engage therod 31 when the door has been moved from its closed position to preventthe movement of the bolt, and to be disengaged from the rod 31 when thedoor has been again moved into its closed posi tion. to release the bolt&. In that form of the invention shown in Fig. 1 the rod 31 is providedwith a notch 33 adapted to receive and to be engaged by adetent 34which, in the present instance, is in the form of a pawl carried by anarm 35 pivotally mounted on the door acent'to the rod 31 and extendinglen thwise of the rod. A spring 36 connected with the pawl serves tohold the pawl and the arm 35 normally in such positions that the pawlwill not in terfere with the movement of the rod 31 and bolt 4. Theposition of the pawl rela tively to thearm 35 may be adjusted by meansof a screw 37. The pawl 34: is normally so adjusted that a slightmovement of the free end of the arm 35 toward the door will carry theend of the pawl 34: into the notch 33 and thus lock the rod and boltagainst movement. This movement of the arm 35 is accomplished by thefirst movement of the door away from its closed position and, as hereshown, it is caused by a finger 38 mounted independently of the door andso arranged that when movement is imparted to the door the arm 35 willbe moved into engagement therewith and caused to move about its pivotalconnection to the door. Preferably, the finger 38 is yieldable so thatafter sufficient movement'has been imparted to the arm 35 to lock therod 31 against movement the finger will yield to permit of the furthermovement of the door. To this end the finger is here shown as pivotallymounted on an aXis substantially coincident with he axis of the hinge 39on which the door is mounted. A spring 10 holds the finger 38 in itsnormal position adjacent to the end of-the arm 35. The spring 40 is ofgreater stiffness than the spring 36 and, consequently, the spring 36will yield to permit the movement of the arm 35 before the finger 38will move, but the movement of the arm 35 will bring the same intoengagement with the door or other fixed stop and the end of the arm 38will then ride over the outer surface of the arm and will be movedoutward against the tension of the spring 10. The outer edge of the arm;35 is preferably inclined or curved to permit the end of the finger toslide over the same. In this manner it will be apparent that the instantthe door is opened, even to a very slight extent, the arm 35 will bemoved inward and the pawl caused to engage the rod 31 to lock the sameagainst movement, andlike'wise that the movement of the door'to itsfully closed'position will permit the arm and its detent to return totheir normal positions and release the rod and the bolt.

I have also provided means to prevent anyone tampering with thecontrolling mechanism, as by inserting wires about the ends of thecasing or through the hinge. To this end one end of the casing 3:2isenlarged to inclose the hinge and is made up of telescoping sections41 so that the hinge will always be inclosed but the casing will notinterfere with the movement of the door. Further, I have provided thathinge of the door about which the controlling device is mounted of aspecial construction to pre vent the insertion of a wire between the twoleaves of the hinge. As here shown, one leaf of the hinge has a recess42 through which extends a curved projection 43 carried by the otherleaf of the hinge. Thus, the two parts of the hinge will overlap in allpositions and it will not be possible to insert a wire or any implementbetween the two parts of the hinge. For a similar reason T have provideda guard at that end of the controlling device remote from. the hinge. Asshown, the casing 32 is enlarged toreceive the controlling mechanism andI have secured to the enlarged portion of the casing at a point slightlyremoved from the end wall thereof a partition or rib 1% and have securedto the rod 31 atprojection t5 which extends into the space between theprojection a l and the end wall of the enlarged portion of the casing.Thus these projections constitute bafiies which will effectually preventthe insertion of a wire, even though ac cess might be had thereto at.the point of connection of the two parts of the casing 32.

InFigs. 2 and, 3 of the drawings I have illustrated another embodimentof the invent-ion. As here shown the rod 31 is mounted in the casing 32-as before and is provided at its rear end with an aperture 46 which,when the bolt is in its retracted position, will be moved into'alinementwith and adapted to receive a detent 47 which is here shown as a fingermounted on the door casing and curved about the hinge 4:8 and having itsfree end arranged close to the rod 31. It will be apparent that inasmuchas the finger is held against movement, the movement of the door willcause the end of the finger to enter the aperture in the rod and thuslock the rod and the belt against.

movement. The hinge and finger are preferably inclosed in a telescopingcasing to prevent access being had thereto. This casing as a whole issubstantially semi-spherical in shape and one wall, 49, thereof issecured to the casing 32, while the other wall, 50, is secured to thedoor frame. This device is very simple and very strong but in practicaloperation the clearance between the parts would probably be such thatthe free edge of the door would have to be moved a considerable distancebefore looking engagement was had between the finger i7 and the rod 31and to prevent the manipulation of the boltor look before this lockingengagement is had the keeper for the bolt is provided with a long guard51 which prevents the bolt beingmoved into its extended or lockingposition until the door has been moved far enough to cause a locking engagement between the finger a7 and the rod 31.

Electrical or electrically operated devices may also be provided and inFigs. 4 and 5 I have illustrated one form of electrical device in whichthe circuit is broken and closed by the movement of the door. As thereshown the rod 31 is provided with a notch as in the form shown inFig. 1. A spring actuated pawl 53 is pivotally mounted adjacent to thenotch 52 and is held normally in engagement with the rod so that it willenter the notch when the bolt is moved to its retracted position. Ihismove ment, however, is prevented by the action of an electro-magnet 5dwhich is here shown in the form of a solenoid, the core 55 of which isconnected with the pawl 53 by means of a lever 56. WVhen the door is inits closed position the electro-magnet will be energized and the pawlheld out of engagement with the rod. When the door is moved away fromits closed position the magnet will be deenergized and the spring willmove the pawl into the notch. Any suitable circuit breaker and closermay be employed. As here shown both sides of the circuit are broken andto this end the door is provided with two contact members 57 which movetherewith and the door frame is provided with two other contact members58, these contact members being connected with the respective parts ofthe circuit and being so arranged that when the door is moved from itsclosed position the contact members 57 will be moved out of engagementwith the contact members 58 and the circuit broken.

In Figs. 6 and 7 I have illustrated the invention as applied to asliding door. The door is indicated at 59 and the lock casing l ismounted on the frame of the door. The bolt 4 projects into a recess orkeeper 60 on the face of the door. In the present instance this keeperis in the form of a recess 60 formed in a bar 61 which extends acrossthe face of the door. When the door is in its fully closed position therecess 60 will be in alinement with the bolt. IV hen the bolt has beenretracted and the door moved out of its closed position the face of thebar will be moved in front of the bolt and it will be impossible to movethe same into its locking position and, consequently, it will beimpossible to operate the recording devices.

From the several illustrations of the invention which are herein shownand described it will be apparent that the invention may be embodied inany one of a great many forms and further, it will be apparent that itmay be applied to various uses, for while it is here illustrated inconnection with a recording lock it will control the operation of thelock either in connection with or independently of a recording deviceand is rseful wherever such control may be desired. 1, therefore, Wishit to be understood that I do not desire to be limited to the details ofconstruction shown and described for obvious modifications within thescope of the claims will occur to a person skilled in the art and Iconsider myself the first to provide means of any kind for controllingthe manipulation of a lock or the operation of a recording device by theposition of the door.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent, is

1. In a device of the character described, the combination with amechanism adapted to be mounted on a door, and having a part to beoperated, of means controlled by the movement of said door to controlthe operation of said part, said means being operable only by themovement of said door.

2. In a device of the character described,

the combination with a mechanism adapted to be mounted on a hinged doorat a point remote from the axis thereof and having a part to beoperated, of means mounted near the hinged edge of said door andcontrolled by the movement of said door from its closed position toprevent the operation of said part, said means being inaccessible formanual operation when the door has been moved from its closed position.

8. In a device of the character described, the combination with amechanism adapted to be mounted on a hinged door at a point remote fromthe axis thereof and having a part to be operated, of means mounted nearthe edge of said door and controlled by the movement of said door fromits closed position to prevent the operation of said part, and a casingto incloSe said means to pre vent it from being manually operated whensaid door has been. moved from its closed position.

4. In a device of the character described, the combination with amechanism adapted to be mounted on a hinged door at a point remote fromthe axis thereof and having a part to be operated, of means mounted nearthe edge of said door and controlled by the movement of said door fromits closed position to prevent the operation of said part,

and a casing to inclose said means, said cas-.

ing having relatively movable parts adapted for connection respectivelywith the door and a fixed part adjacent to the door, and arranged topermit the door to be moved without opening the casing.

The combination with a lock for a door, comprising a casing, and adevice operatively connected with said lock, of means to control theoperation of said device comprising a part extending beyond said casing,and means mounted exteriorly of said casing and controlled by themovement of said door to lock said part against movement.

6. The combination, with a lock for a door, comprising a casing, and adevice operatively connected with said lock, of means to control theoperation of said device comprising a rod extending beyond said casing,and a detent arranged to engage said rod to hold the .same againstmovement when said door has been moved from' its closed position.

The combination with a lock for a door, comprising a casing, and adevice operas. tively connected with said lock, of means to control theoperation of said device, com-, prising a rod extending beyond saidcasing, a detent to be mounted on said door exteriorly of said casing,and means adapted to be mounted independently of said door to cause saiddetent to engage said rod and hold the same against movement when saiddoor has been moved from its closed position. 7

8. The combination with a lock for a swinging door, said lock comprisinga bolt, of means controlled by the swinging movement of the door toprevent the movement of said bolt when said door has been moved from itsclosedposition, said means being incapable of-manual operation.

9. The combination with a lock for a swinging door, said lock comprisinga bolt, of means controlled by the swinging movement of the door toprevent the movement of said bolt when said door has been moved from itsclosed position, and means to prevent access being had to' said doorcontrolled means when said door has been moved from its closed position.

10. The combination with a lock for a door, comprising a casing and abolt mounted in said casing, of means to control the operation of saidbolt comprising a rod connected thereto and extending beyond saidcasing, and means mounted exteriorly of said casing and controlled bythe movement of the door to lock said rodagainst movement. 7

11. The combination with a lock for a door, said lock comprising a bolt,of controlling devices comprising an extension to said bolt, and alocking member supported at a point remote from. said boltand arrangedto he moved into. locking engagement with the extension of said boltwhensaid door is moved from its closed position. 12. The combination With alock for a door, said lock comprising a casing and a bolt mounted withinsaid casing, of means to control the movement of said bolt comprising aaart connected therewith and extending beyond said lock casing andaloc'king member mounted exteriorly of said casing and arranged tooperatively engage said part when said door is moved from its closedposition.

13. The combination with a lock for a door, said lock comprising acasing and a bolt mounted in said casing, of means to control themovement of said bolt comprising a part to be mounted on said doorexteriorly of said lock casing and connected with said bolt, andapartadapted to be mounted independently of said door, said parts beingarranged tobe brought into op.- erative engagement by the movement ofthe door and 'to thereby cause the bolt to be locked against movement.

14. The combination with a lock for a door, said lock comprising acasing and a bolt mounted in said casing, of means to controlthemovement ofsaid bolt comprising a part to be mounted on said doorexteriorly of said lock casing and connected with said bolt, a partadapted to bemounted independently of saidv door, said parts beingarranged to be broguht into operative engagement by the movement of thedoor and to thereby cause the bolt to be locked against movement, andmeans for inclos ing said controlling means to prevent the manualoperation thereof. 7

15. The combination with a lock for a door, said .1001: comprising acasing and a bolt having an extension projecting beyond said casing, ofa detent mounted exteriorly of said casing and adapted to operativelyengage said extension when said door is moved from its closed position.

16. The combination with alock fora door, said lock comprising a casingand a bolt having an extension projecting beyond said casing, of adetent mounted exteriorly of'said casing and supported normally out ofengagement with said extension,: and means controlled by the movement ofsaid door to cause said detent to engage said extension.

17. The combination with a lock fora door, comprising a bolt having anextension, of a detent adapted to be mounted on said door adjacent-tosaid extension and to be moved into and out of operative engagementtherewith, and a part to be supported on the door frame to cause saiddetent-to be moved into operative'engagement with said extension.

18. The combination, with a lock for a door, said lock comprising a bolthaving an extension, of a supporting member adapted to be movablymounted on said door, a detent carried by said supporting member, and apart to be mounted independently of said door to engage said supportingmember when movement is imparted to said door and move said detent intoengagement with said extension.

19. The combination, with a lock for a door, said lock comprising a bolthaving an extension, of an arm adapted to be pivotally mounted on saiddoor, a detent carried by said arm and adapted to be moved into and outof operative engagement with said extension by the movement of said arm,and a finger to be mounted adjacent to said door and arranged to engagesaid arm when said door is moved from its closed position.

20. The combination, with a lock for a door, said lock comprising a bolthaving an extension, of an arm adapted to be pivotally mounted on saiddoor, a detent carried by' said arm and adapted to be moved into and outof operative engagement with said extension by the movement of said arm,and a yieldable finger to be mounted adjacent to said door and arrangedto engage said arm when said door is moved from its closed position.

21. The combination, with a lock for a door, said lock comprising a bolthaving an extension, of an arm adapted to be pivotally mounted on saiddoor, a detent carried by said arm and adapted to be moved into and outof operative engagement with said extension by the movement of said arm,a finger to be pivotally mounted adjacent to said door and having itsfree end arranged in the path of said arm, and a spring to resist themovement of said finger when engaged by said arm.

22. Thecombination, with a lock for a door, said lock comprising a bolthaving an extension, of an arm adapted to be pivotally mounted on saiddoor, a detent carried by said arm, a spring to hold said arm and saiddetent normally in their inoperative positions, a finger to be pivotallymounted adj acent to said door and arranged to be engaged by said armwhen movement is imparted to said door, and a spring to resist themovement of said finger when engaged by said arm, said last-mentionedspring being of greater strength than the spring connected with saidarm.

23. The combination, with a lock for a door, said lock comprising a bolthaving an extension, of an arm adapted to be pivotally mounted on saiddoor, a pawl mounted on said arm and adapted to be moved'into operativeengagement with said extension, means to adjust said pawl relatively tosaid arm, and a yieldable finger to be mounted adjacent to said dooradapted to engage said arm when movement is imparted to said door andmove said pawl into engagement with said extension.

24. The combination, with a lock for a door, said lock comprising abolt, of cooperating devices controlled by the movement of said door tolock said bolt against movement, and a collapsible casing to inclosesaid cooperating devices.

25. The combination with a lock for a door, said lock comprising abolt,of co6perating devices to control the movement of said bolt, a part ofsaid devices being adapted to be supported by the door and a part by thedoor frame, and a casing inclosing said cooperating parts and havingrelatively movable parts adapted to be connected respectivelv with thedoor and with the door frame and arranged to maintain the casing closedwhen the door is in any position.

26. The combination, with a lock for a door, said lock comprising abolt, of cooperating devices to control the movement of said bolt, apart of said devices being adapted to be supported by the door and apart by the door frame, and a collapsible casing adapted to be mountedin part on said door and in part on. said door frame to inclose saidcooperating parts without interfering with the movement of said door.

27. The combination, with a door, a hinge to support said door, and alock for saiddoor comprising a bolt, of cooperating devices to controlthe movement of said door, said devices being supported partly by thedoor and partly by the door frame, said door hinge having interlockingparts to pre 7 vent access to said cooperating devices.

28. The combination, with a lock for a door, said lock comprising a bolthaving an extension, of cooperating devices mountedadjacent to saidextension to control the movement thereof, a housing to inclose saidvextension and said cooperating devices, and

battle plates carried by said housing and said extension to prevent theinsertion of an implement in said housing.

29. The combination with a lock for a swinging door, comprising a deviceto be operated arranged at a point remote from the axis of said door, ofmeans controlled by the movement of said door to positively prevent theoperation of said device when said door'is out of a predeterminedposition, and other means to prevent the manual manipulation of thefirst-mentioned means.

30. The. combination with a lock for a swinging door, comprising adevice to be operated arranged at a point remote from the axis of saiddoor, of automatic'means to positively prevent the operation of saiddevice when said door is in any position ex- I cept its closed position,and means to prevent the manual manipulation of said automatic means.

31. In a device of the character described, the combination With amechanism adapted to be mounted on a door and having a part to beoperated, of cooperating devices controlled by'the movement of said doorto control the movement of said part, aportion of said devices beingadapted to be supported by the door, and another portion of said devicesbeing adapted to be supported by the door frame.

32. The combination with a lock for a swinging door, said lockcomprising a bolt, of cooperating devices to control the movement ofsaid bolt, a part of said devices being adapted to be supported by thedoor, and a part by the door frame, and means to pre vent access beinghad to said bolt controlling devices When said door has been moved fromits closed position.

In testimony whereof, I affix my signature in presence of two Witnesses.

I BERNARD H. ZIEHLER.

\Vitnesses:

EDWARD L. REED, H. L. HAuMAKER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

